Feat/cog overviews

[wildintellect]

New notebook showing an in-depth comparison of overview resampling methods.

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kylebarron commented on 2023-11-13T22:41:22Z
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Maybe add a hyperlink to titiler?

Upper case GDAL in "available in gdal"?

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kylebarron commented on 2023-11-13T22:41:23Z
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You say "The original file does not contain overviews" but it shows IFDs 1, 2, and 3 have positive decimations...? I thought that meant this file does contain some overviews.

wildintellect commented on 2023-11-13T23:31:00Z
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Oh, right since I changed the example file to an updated one that's actually a COG. I suppose I can just drop that part of the sentence.

wildintellect commented on 2023-11-15T00:50:14Z
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reworded

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kylebarron commented on 2023-11-13T22:41:24Z
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Line #6.    OverviewResampling = [r for r in ResamplingEnums if (r.value < 8) or r.value > 13]

I think this is pretty hard for someone to follow because they have to know the specific ordering of items in ResamplingEnum as well as what those mean. Even if it's verbose, I'd suggest having a more literal list like just

resample_methods = [
Resampling.nearest,
Resampling.bilinear,
...

]

wildintellect commented on 2023-11-13T23:35:14Z
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It's dynamic though, if/when GDAL adds more options they automatically are part of the list(which did happen during the original implementation of this code), assuming GDAL doesn't change the order. I'll think about how to simplfy, thanks.

kylebarron commented on 2023-11-13T23:42:53Z
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I think as long as you don't exclude by number, it'll read more clearly. How about:

from rasterio.enums import Resampling
excluded_resamplings = {

Resampling.max,

Resampling.min,

Resampling.med,

Resampling.q1,

Resampling.q3,

}

resample_methods = [

method for method in Resampling if method not in excluded_resamplings

]

resample_methods
[<Resampling.nearest: 0>,
<Resampling.bilinear: 1>,
<Resampling.cubic: 2>,
<Resampling.cubic_spline: 3>,
<Resampling.lanczos: 4>,
<Resampling.average: 5>,
<Resampling.mode: 6>,
<Resampling.gauss: 7>,
<Resampling.sum: 13>,
<Resampling.rms: 14>]

[kylebarron]

Some comments on readability and overviews, but otherwise looks good

[wildintellect]

Oh, right since I changed the example file to an updated one that's actually a COG. I suppose I can just drop that part of the sentence.

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[wildintellect]

It's dynamic though, if/when GDAL adds more options they automatically are part of the list(which did happen during the original implementation of this code), assuming GDAL doesn't change the order. I'll think about how to simplfy, thanks.

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[kylebarron]

I think as long as you don't exclude by number, it'll read more clearly. How about:

from rasterio.enums import Resampling
excluded_resamplings = {

Resampling.max,

Resampling.min,

Resampling.med,

Resampling.q1,

Resampling.q3,

}

resample_methods = [

method for method in Resampling if method not in excluded_resamplings

]

resample_methods
[<Resampling.nearest: 0>,
<Resampling.bilinear: 1>,
<Resampling.cubic: 2>,
<Resampling.cubic_spline: 3>,
<Resampling.lanczos: 4>,
<Resampling.average: 5>,
<Resampling.mode: 6>,
<Resampling.gauss: 7>,
<Resampling.sum: 13>,
<Resampling.rms: 14>]

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[wildintellect]

reworded

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